Name: one-eye-luke US.Vet. Texas (Zone 8a) Quitter's never Win
I can't see anything wrong with your ficus. I think you are doing a good job taking care of your FLF. When you say you water when the top half inch is dry, I think you are ok. The only thing I would add is to water until you get just a little discharge out the bottom of the container then allow to dry well. Thanks for sharing.
NOT A EXPERT! Just a grow worm! I never met a plant I didn’t love.✌